Samuel x t tarver



i UNITED N sTATEs PATE Specication of Letters Patent No. 26,381, dated`December-6 i To all whom 'it may concern:

Be it known that I, SAMUEL TAEVER, of

Searcy, county of White, and State of Arkanannexed drawings, which makepart of this specification.

Since utility and practicability enter largely into the question as toobtaining Let-- ters Patent, you will please allow me to state, that thenature and design `of my invention consist in so arranging its parts, asthat great saving'in motive and in timber is effected, by accomplishingwith a small thin circular saw, all that can be done with a large thickone;` and in so suspending` the log orstock upon pivots or centers, asto make it most easily controlledwhile being sawed, and in setting thesawatevery line run to the log, instead of setting the lo to the saw.And of causing the sawto eed along to the log on a light carriage, andto a perfectly true guide, instead of the log to the saw, having greatlyin view the much smoothness of plank made by a smallsaw, over that ofplank made by a large saw.

I will now proceed to describe theconstruction of my machine.

In Figure l, we have a profile or side view'.`

A, B, C, D, E, H constitute one side of the wooden stand upon which thelog X suspends, and upon which the saw J, feeds along and gigs back. Bis a sill 4 inches thick, 8 inches wide, and about 18 feet long, havingits parallel and equiform mate about 4 feet apart, upon both of whichthe saw carriage travels. These sills are notched down and wedged downinto cross ties, of which c, c, are the ends. Upon these cross ties,arise two trestles about three feet high, of which D, D, are theuprights, and E, E, the ends of the cap sills. Upon these trestles laytwo timbers 4 inches thick, 8 inches wide, about 4 inches apart, whereofA is representative. Upon these last named timbers set the head-blocks FF, upon whose pivot bolts G, G, the log X suspends. I-I, H, are bracesreachin from the sills to the cap sills, and upon w ich the bearings ofthe shafts containing the pulleys I, I, are built.

I will now describe the construction of the saw carriage, by referringyour attention to Vsent the saw pulle NTFFICE frame work. To theqouts ofwhich R, R are its sides y p y f `by-gwhichfthe rect is secured.. H Yupon` wh 1H shaft nds itsbearing nd by which saw gets its rectangular f',while bein,D set out to the stock; 1by the screwiand cranl Z.s,s,s,`s,are guidesjby which" an kept in the other whilesetting;l the orcalling it back."` isthe;` is to be induced to its rectilin withthepulleys II of Fig. upon each sideo it, finding` suppo one or both sideslof the timb R 3. `Upon the bottomof 4 rollers of which Lf,L, the easylocomotion of the sa y y W, W, of Fig. .3 are made effective by havin astraight and truetimberappliedibetween them, which timberfastens upon heross ties ofFig. l, like the sillsof` the By'referring to Fig 2 how thesaw getsits` circled by roundfb g side of itself-to the ulleys fl, anduniting at Qg Nowif the` p be put in motion?" by .nyl `drivinglwhee isevident that the saw"`ulley w the `same motion; `and "w1 4hout discation of the same"`motion,"the saw,by able .gearingfmaybe pliedfanywhere,l tween the I pulleys.` `g Theffeed and `fba` 13 motion of the samesobtained, "from the shaft of first Ifpulley, on the same principle,that like motion isuobtainedlfrom thesaw shaft of ordinary circularmillsforthe log carriage.` Thus ifa belt pass from` shaft of (l) first Ipulley to pulleyN,`the`gpi ion P of the shaft" of N lwill,operate` upthe rag wheel C. Uponitheshaft of this rag wheel is a pinion whichexerts` itself"` upon a strai ht line lof. spursfastenedfto the bottom othe carriage. When it is dej-` sireol to get the gigging backof thesaw,let the pinion P be thrownjout,oflgearfthen by tightening upon the slackbelt 2 2 2,2 &o., `the l motion willbe obtained. The pulley M is notintended to lbefastenedfto its saw shaft, `but allowed to be penetratedby its shaft, just as the `saw isset;` out or'in by the crank Z of`F2'lg.f3-n `The `sa must therefore have `a` continuousfk it, so thatthe key seat of the pulley,

of the shaft are adjustable. g1

Next, by referring to Fig. 4, we have the geometryby which a stick oftimber 2 feet in diameter is divided into plank by a circular saw 18 or2O inches in diameter. I will irst state that the saw has no nave or nuton its outside. The saw is fastened to its shaft by three or more boltspassings through a collar of the shaft, and screwing into a ring ofmetal which is riveted or soldered to the center Vof the saw, as in Fig.4, wherein J is the saw, U is the shaft, T the pulley, 6 the metal tapor ring into which the bolts 7,7 are seen passing through the collar ofsaw shaft into said ring of metal. When the stock is to be suspended forsaw, let a hole be bored in each end of it 2 or 3 inches deep of 1% inchcaliber say. Vhen the stock is rolled up to its place, let the pivots ofthe head blocks F F be introduced; then by coming up 2 or 3 times uponthe taps 9, 9 of Fig. l,`the timbers upon which the stock was rolledwill be relieved, and ready for removal, when the stock will besuspended upon centers. Now by the turning down upon the taps 9, 9, thestock can be lowered, so'that the saw may enter any desired depth intoit. The stock being now made stationary by dogs reaching from anysuitable point, the saw is put in motion and allowed to run a line, thenit is backed and set out by the screw and crank Z of Fig. 3, and so onuntil a series of lines is run throughout the stock as represented bydiagram l of Fig 4.` The log is next turned over, and another series oflines run at right angles to the lirst, and so on until all four sidesare sawed, as seen in diagram 23 of Fig. 4, wherein 4 corners areobserved to have been takenout by vthe meetin of the lines.

Now if the stock be lowered six inches, you will perceive that a numberof plank can be cut ofiI by Ya line which reaches to the center line ofthe stock.y By turning, the same thing may be done at every angle. Whenthis trimming of the Stock is being effected the lateral position Vofthe saw should not be disturbed by the crank Z of Fig. 3; otherwise thesquare within the circle of the stock will not be accomplished. Vhenthis square is accomplished if it is only double the depth that the sawwill out,

it can be turned into plank, just equal in width to the diameter oftheentire saw blade, minus the diameter of the collar and ring of the Ysawand shaft. This can be effected, by running a series of lines on oneside, and by meeting them with a similarV series on the other. This canonly be done upon the completion of the stock into timbers or plank. Ifit be desirable, in a stock of 24 inches diameter say, 12 lines may berun, and six inch plank trimmed off, as in diagram 4 of Fig. 4, whereinis seen the saw J operating upona 6 inch tier.

What I claim as my invention and desire to secure by Letters Patent ofthe United-V SAMUEL TARVER.

Vitnesses:

M. F. TARVER, TI-Ios. lVATkINs.

